31 x 39 cm. Relief shown by hachures and spot heights. "Entered in Sta. Hall London & according to act of Congress in the year 1857 by H.D. Rogers in the Clerks Office of the District Court of Massachusetts." Includes proposed Pacific railway routes. In upper margin: Atlas of United States &c., 13. Original publisher: John Murray, Scale: 3,450,000 of nature, 54 1.